JP2001079892A - Method and mold apparatus for molding injection-molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for molding a molded object having a plurality of inserts provided thereto and a mold apparatus therefor, more precisely, an injected-molded article molding method capable of efficiently and economically demolding the molded article without damaging the inserts in an injection mold apparatus arranging the inserts to a mold accurately for a short time and demolding the molded article in the direction angularly different from the longitudinal direction of the inserts and a mold apparatus therefor. SOLUTION: After a magnet 4 is embedded in a first insert 6 beforehand, a second insert 2 made of at least iron is arranged so as to come into contact with the magnet 4 by using an insert setting tool and, further, a coil spring 13 is provided to the first insert 6 as a demolding auxiliary means so as to apply energizing force in the longitudinal direction of the first insert 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding a molded article provided with an insert and a mold apparatus therefor, and more particularly, to a method for accurately installing an insert in a mold and / or a method for determining the longitudinal direction of an insert. Injection mold equipment that separates molds at different angles.Easy to install inserts when installing inserts.Effective and economical release without damage to inserts when releasing molded products. The present invention relates to a method for molding an injection-molded article that can be molded and a mold apparatus therefor.

[0002]

2. Description of the Related Art An injection molding method for molding a molded product by injecting a molten resin into a fixed mold and a movable mold, and a cavity formed between the molds, and a mold apparatus therefor. When installing an insert in a mold,
When the second insert was installed after the first insert was installed, the second insert was installed in the first insert by hand or with tweezers, so that it was difficult to position the installation position of the second insert, and more time was required. Further, when the second insert is installed in the movable mold, the position of the second insert is shifted due to the movement of the mold, and in the worst case, the second insert comes off the mold and falls.

Further, also in the fixed mold, when the second insert 2 is installed downward toward the cavity 20 as shown in FIG. 7, the position of the second insert 2 is similarly shifted, and in the worst case, There has been a case where the insert 2 comes off the fixed mold 7 and falls in the direction of arrow 19.

Further, when releasing the molded body provided with the insert from the mold, if the mold is released in parallel with the longitudinal direction of the insert, the insert is provided without any damage or bending. The molded product was released from the mold. However, when the insert is provided at an angle to the mold release direction, that is, when the angle between the mold release direction of the injection molding mold device and the longitudinal direction of the insert is different, the insert may be damaged or the insert may be bent. Occurred.

[0005]

SUMMARY OF THE INVENTION The present invention solves such a problem and provides a method for molding a molded article provided with a plurality of inserts and a mold apparatus therefor. A method of installing in a mold and a mold apparatus therefor, and furthermore, an injection mold apparatus for releasing the mold in a direction different from the longitudinal direction of the insert, and efficiently and economically without damaging the insert. It is an object of the present invention to provide a method for molding an injection-molded article that can be released, and a mold apparatus therefor.

[0006]

According to the present invention, a first insert and a second insert are embedded in at least one of a fixed mold and a movable mold in order to achieve the above object. Injection molding, wherein molten resin is injected into a cavity formed by the fixed mold and the movable mold to form a molded product, and then the molded product is released from the mold together with the first insert and the second insert. In the molding method of
There is a method for molding an injection-molded article in which a first magnet is embedded in a first insert in advance, and then at least an iron second insert is installed using an insert set jig so as to contact the magnet.

After the magnet is embedded in the iron first insert in advance, the second insert is quickly and easily mounted by using an insert set jig so that at least the iron second insert is in contact with the magnet. The second insert can be installed in the insert, the position of the second insert can be fixed, and when the second insert is installed on the movable mold side or the fixed mold side, the second insert faces downward toward the cavity. , The second insert does not move in the mold.

According to a second aspect of the present invention, at least the second magnet is provided in the insert set jig, and the magnetic force of the second magnet is smaller than that of the first magnet. It is in the molding method of molded articles.

According to the second aspect of the present invention, since the magnetic force of the second magnet is smaller than that of the first magnet, the insert set jig is removed after the second insert is placed in contact with the first magnet. 2 It can be easily detached from the insert.

According to a third aspect of the present invention, an insert is embedded in at least one of a fixed mold and a movable mold at an angle with respect to a releasing direction. Injection of a molten resin into a cavity formed from a movable mold, a molding method for an injection-molded product in which a molded product is molded and then the molded product is released together with an insert from the mold.
By providing a mold release assisting means so that a biasing force is applied to the insert in the longitudinal direction of the insert, molding is performed by applying a biasing force in the longitudinal direction of the insert when the molded product is released from the fixed mold and the movable mold. The present invention relates to a method for molding an injection-molded product, which facilitates the release of the product.

According to the third aspect of the present invention, when the molded article is released from the fixed mold and the movable mold, the mold is provided with the mold release assisting means so that a biasing force is applied to the insert in the longitudinal direction. This is an injection molding release method that facilitates the release of molded products by applying a biasing force in the longitudinal direction of the insert and vibrating, so that when the molded product is released from the mold, Since the biasing force is applied and the insert can be released along the longitudinal direction, the insert is not damaged or bent due to interference with the mold during release.

In the invention according to claim 4, a plurality of the inserts are embedded in at least one mold,
2. The method according to claim 1, wherein the release assisting means is a coil spring wound around the insert so that a biasing force is applied in a longitudinal direction of the insert.

According to the fourth aspect of the present invention, a plurality of the inserts are embedded in at least one of the molds, and the release assisting means is wound around the inserts so that a biasing force is applied in the longitudinal direction of the inserts. Since the coil spring is worn, even if there are a plurality of inserts, the molded product can be economically released without damaging the inserts or bending the inserts.

According to a fifth aspect of the present invention, the first insert and the second insert are embedded in at least one of the fixed mold and the movable mold, and are formed from the fixed mold and the movable mold. Injecting a molten resin into the cavity, molding the molded product, and then releasing the molded product together with the first insert and the second insert from the mold, in a method of molding an injection molded product, in advance, in the iron first insert. After embedding the first magnet, at least the second insert made of iron is installed using an insert set jig so as to abut the magnet, and the mold release assist is applied to the first insert so as to apply a biasing force in the longitudinal direction of the insert. By providing a coil spring as a means, a biasing force is applied in the longitudinal direction of the first insert when the molded product is released from the fixed mold and the movable mold. In molding process of an injection molded article to facilitate release of the molded article Te.

According to the fifth aspect of the present invention, the second insert made of iron is installed using the insert set jig so as to be in contact with the magnet in the first insert made of iron, so that the positioning of the second insert is ensured. It can be done quickly and the second insert does not drop. Further, by providing a mold release assisting means so that a biasing force is applied to the first insert in the longitudinal direction, when the molded article is released from the fixed mold and the movable mold, the insert is released along the longitudinal direction. This prevents the insert from being damaged or bent due to interference with the mold at the time of release.

According to a sixth aspect of the present invention, there is provided an injection molding apparatus comprising a fixed mold and a movable mold, wherein at least one of the molds has the first insert and the second insert embedded therein. In a mold apparatus, there is provided a mold apparatus for injection molding in which the first insert is made of iron, a magnet is embedded in the first insert, and a second iron insert is further embedded so as to contact the magnet.

According to the sixth aspect of the present invention, the magnet is embedded in the first iron insert, and the second iron insert is further embedded so as to contact the magnet, thereby fixing the position of the second insert. In addition, it becomes easier to install the second insert in the first insert, and when the second insert is installed on the movable mold side or on the fixed mold side, the second insert faces downward toward the cavity. Even when installed, the second insert does not move within the mold.

According to a seventh aspect of the present invention, there is provided an injection mold apparatus comprising a fixed mold and a movable mold, wherein an insert is embedded in at least one of the molds at an angle with respect to a mold release direction. In the injection molding die apparatus, the insert is provided with a mold release assisting means.

According to the seventh aspect of the present invention, when the molded article is released from the fixed mold and the movable mold, the mold is provided with release assist means so that a biasing force is applied to the insert in the longitudinal direction. The method of releasing an injection molded product facilitates the release of the molded product by applying a biasing force in the longitudinal direction of the insert, thereby facilitating the release of the molded product from the mold. Since the force is applied and the insert can be released along the longitudinal direction, the insert does not suffer damage due to interference with the mold or bend at the time of release.

In the invention according to claim 8, a plurality of the inserts are embedded in at least one of the molds, and the release assisting means is wound around the inserts so as to apply a biasing force in the longitudinal direction of the inserts. The injection molding die device according to claim 7, which is a coil spring.

According to the present invention, a plurality of the inserts are embedded in at least one of the molds, and the release assisting means is wound around the inserts so that a biasing force is applied in the longitudinal direction of the inserts. Since the coil spring is a plurality of inserts, it is possible to reliably and economically release the molded product even if there are a plurality of inserts, and to reliably and economically release the molded product without bending the inserts.

According to a ninth aspect of the present invention, there is provided an injection mold apparatus comprising a fixed mold and a movable mold, wherein at least one of the molds has the first insert and the second insert at an angle with respect to the mold release direction. In the injection molding die apparatus embedded with a plurality of pieces, a magnet is embedded in a first insert made of iron, and at least a second insert made of iron is installed so as to be in contact with the magnet. The injection molding die apparatus is characterized in that a coil spring wound around the first insert is provided as a mold release assisting means so as to apply a biasing force in a longitudinal direction of the insert.

According to the ninth aspect of the present invention, by positioning the second insert made of iron so as to contact the magnet in the first insert made of iron, the positioning of the second insert can be reliably performed, and the second insert can be used. No more falling off. Further, by providing a release assisting means so that a biasing force is applied to the insert in the longitudinal direction, when the molded product is released from the fixed mold and the movable mold, the insert can be released along the longitudinal direction. By doing so, the insert is prevented from being damaged or bent due to interference with the mold during release.

[0024]

FIG. 1 is a sectional view of an embodiment of an injection mold apparatus according to the present invention. In a state where a movable mold 5 and a fixed mold 7 are opened, first a coil spring 13 is fixed to a fixed mold 7. It is installed in the space 12 where the coil spring 13 is installed. Next, the first insert 6 made of iron is installed in the fixed mold 7 by inserting the first insert 6 into the coil spring 13. Next, the magnet 4 is installed in the groove 14 of the first insert, and the second insert 2 made of iron is installed so as to be in contact with the magnet. FIG. 1 is a view in which the coil spring 13, the first insert 6, the magnet 4, and the second insert 2 are respectively installed in a fixed mold 7, and the plate 9, the fixed mold 7, and the movable mold 5 are closed. .

When the second insert is installed so as to be in contact with the first magnet, an insert set jig 8 shown in FIG. 4 is used. FIG. 4A is a cross-sectional view showing a state where the second insert 2 is mounted on the insert set jig 8, and FIG. 4B is a view showing a state where the second insert 2 is mounted on the insert set jig 8 and the first magnet is mounted. FIG. 4 is a view showing a state in which it is set in a mold while being in contact with the mold 4;
(C) is the figure which removed the insert set jig 8 from the 2nd insert 2 after installing the 2nd insert 2 in a metal mold | die.

The insert set jig 8 includes the holder 2
1 and an insert support mechanism 23. After the second insert 2 is mounted on the first magnet 4, the insert set jig 8 and the second insert 2
The coil spring 25 may be wound around the insert support mechanism 23 so that the coil spring 25 can be detached.

The insert support mechanism 23 for mounting the second insert 2 is provided with a claw-shaped projection and a contact surface for supporting the second insert 2 at a position where the second insert 2 comes into contact with the second insert 2. There are methods such as attaching a sticky sticker or attaching a magnet.
It is preferable to mount the magnet 10 on the tip of the insert support mechanism 23.

Further, it is preferable that the magnetic force of the second magnet 10 is smaller than that of the first magnet 4. Preferably, the diameter of the second magnet 10 is set to be approximately half or less of the diameter of the first magnet 4 so that the second magnet 1
The magnetic force of 0 can be made smaller than the magnetic force of the first magnet 4.

The first insert 6 and the second insert 2 are embedded in the fixed mold 7 at an angle θ with respect to the mold release direction 15, and the coil spring 13 serves as a mold release assisting means. It is wound around.

The coil spring 13 is wound so that an urging force parallel to the longitudinal direction of the first insert 6 is applied. The release assisting means is not particularly limited as long as it applies a biasing force to the insert such as a cylinder or a coil spring in the longitudinal direction and vibrates the insert in parallel with the longitudinal direction. The coil spring, the leaf spring, the spiral spring, the torsion bar and the like are not limited as long as they have a restoring force by themselves in terms of cost and malfunction, but a coil spring is particularly preferably used.

Examples of the molten resin to be injected include polystyrene, acrylonitrile-butadiene-styrene copolymer, acrylonitrile-styrene copolymer, modified polyphenylene oxide (styrene graft or styrene blended polyphenylene oxide resin), polycarbonate resin, nylon resin, acrylonitrile- Resins such as ethylene propylene-butadiene copolymer and ionically crosslinked polyethylene are suitable, but generally applicable if they are thermoplastic resins.

A method for molding an injection-molded article using the injection mold apparatus of the present invention will be described. As shown in FIG. 1, the coil spring 13, the first insert 6, the magnet 4, and the second insert 2 are respectively installed in the fixed mold 7, and the plate 9, the fixed mold 7, and the movable mold 5 are closed to fix the fixed mold. A first insert 6 having a coil spring 13 wound thereon and a second insert 2 fixed to a first magnet 4 held in the first insert 6 are fixed. At this time, the second insert does not move or drop in the fixed mold 7 by the action of the first magnet 4.
Thereafter, the movable mold 5, the fixed mold 7, and the plate 9 are clamped, and a molten resin is poured from a not-shown injection molding machine into a cavity 20 formed in a space between the movable mold and the fixed mold.

After the mold is cooled and the resin is solidified, the plate 9 is opened in the direction of arrow 16 by the length of the coil spring just before the movable mold 5 opens, as shown in FIG. When the coil spring 13 which has been compressed at that time is opened, the arrow 17 extends parallel to the longitudinal direction of the first insert 6.
Is applied to the first insert 6 and the molded product 3
The force works in the direction of pressing.

Next, as shown in FIG.
And the molded product 3 is released from the fixed mold 7. At this time, the bias force is applied in the direction in which the first insert 6 pushes the molded product 3 by the action of the coil spring 13,
The first insert 6 does not interfere with the fixed
The molded article 3 provided with the insert 6 can be released from the fixed mold 7.

4 to 6 show a case in which one first insert 11 is installed in the fixed mold 7, and the first insert 11 is not released together with the molded product 3. And remains in the fixed mold 7. Here, since the coil spring 13 is wound around the first insert 11 when the molded product 3 is released from the mold, an urging force is applied in the direction of the arrow 17 in parallel with the longitudinal direction of the first insert 11, so that the first insert 11 is pressed. The molded product 3 can be released from the mold without interference of the fixed mold 7 with the mold 11.

[0036]

According to the present invention, in claim 1,
After embedding the magnet in the first insert in advance, the second insert is quickly and easily installed in the first insert by using an insert setting jig so that at least the second insert made of iron is brought into contact with the magnet. And the position of the second insert can be fixed, and when the second insert is installed on the movable mold side or when the second insert is installed downward toward the cavity also on the fixed mold side. However, there is an effect that the second insert does not move in the mold.

According to the second aspect of the present invention, since the magnetic force of the second magnet is smaller than that of the first magnet, the insert set jig is moved to the second magnet after the second insert is placed in contact with the first magnet. There is an effect that it can be easily detached from the insert.

According to the third aspect of the present invention, when the molded article is released from the fixed mold and the movable mold by providing the mold release assisting means so that a biasing force is applied to the insert in the longitudinal direction. This is a method of releasing an injection-molded product that facilitates the release of a molded product by applying a biasing force in the longitudinal direction and oscillating. When the molded product is released from the mold, the biasing force is applied in the longitudinal direction of the insert. Is added, and the insert can be released along the longitudinal direction, so the insert may be damaged by interference with the mold during release,
There is an effect that bending does not occur.

According to the fourth aspect of the present invention, a plurality of the inserts are embedded in at least one mold.
Since the release assisting means is a coil spring wound around the insert so that a biasing force is applied in the longitudinal direction of the insert, even if there are a plurality of inserts, the insert can be reliably formed economically without damaging the insert or bending the insert. There is an effect that the product can be released from the mold.

According to the fifth aspect of the present invention, by positioning the second insert made of iron using the insert set jig so as to abut the magnet in the first insert made of iron, the positioning of the second insert is reliably and quickly performed. It is possible to prevent the second insert from dropping. First
By providing a mold release assisting means so that a biasing force is applied to the insert in the longitudinal direction, when the molded product is released from the fixed mold and the movable mold, the insert can be released along the longitudinal direction. Accordingly, there is an effect that the insert is not damaged or bent due to interference with the mold at the time of releasing the mold.

According to the sixth aspect of the present invention, the position of the second insert is fixed by embedding the magnet in the first iron insert and further embedding the second iron insert so as to contact the magnet. The second insert can be easily installed in the first insert, and the second insert can be installed downward toward the cavity when the second insert is installed on the movable mold side or on the fixed mold side. Even when the second insert is performed, there is an effect that the second insert does not move in the mold.

According to the seventh aspect of the present invention, when the molded article is released from the fixed mold and the movable mold, the mold is released from the fixed mold and the movable mold by providing a mold release assisting means so that a biasing force is applied to the insert in the longitudinal direction. This is a method of releasing an injection-molded product that facilitates the release of a molded product by applying a biasing force in the longitudinal direction and oscillating. When the molded product is released from the mold, the biasing force is applied in the longitudinal direction of the insert. Is added, and the insert can be released along the longitudinal direction, so the insert may be damaged by interference with the mold during release,
There is an effect that bending does not occur.

In the invention described in claim 8, a plurality of the inserts are embedded in at least one mold,
Since the release assisting means is a coil spring wound around the insert so that a biasing force is applied in the longitudinal direction of the insert, even if there are a plurality of inserts, the insert can be reliably formed economically without damaging the insert or bending the insert. There is an effect that the product can be released from the mold.

According to the ninth aspect of the present invention, the second insert made of iron is placed so as to be in contact with the magnet in the first insert made of iron, whereby the positioning of the second insert can be surely performed, and the second insert falls. You don't have to. Further, by providing a release assisting means so that a biasing force is applied to the insert in the longitudinal direction, when the molded product is released from the fixed mold and the movable mold, the insert can be released along the longitudinal direction. This has the effect of preventing the insert from being damaged or bent due to interference with the mold during release.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of one embodiment of an injection mold apparatus according to the present invention, in which a first insert and a second insert are set on a fixed mold with a movable mold and a fixed mold opened, and It is the figure which closed the type.

FIG. 2 is a sectional view showing a state where a plate is slightly opened from the state of FIG. 1;

FIG. 3 is a cross-sectional view showing a state where a fixed mold and a movable mold are separated, and a molded body is released from the fixed mold.

FIG. 4 is a view showing a state where a second insert is installed in a mold using an insert set jig, and FIG. 4 (a) is a cross-sectional view showing a state where the second insert is mounted on an insert set jig; (B) is a diagram showing a state in which the second insert is mounted on an insert set jig, is brought into contact with the first magnet, and is installed in the mold, and (c) is a diagram showing the second insert in the mold. It is the figure which removed the insert set jig from the 2nd insert after installation.

FIG. 5 is a cross-sectional view of another embodiment of the injection molding mold apparatus of the present invention, in which the first insert is installed on the fixed mold with the movable mold and the fixed mold opened, and the mold is closed. FIG.

FIG. 6 is a sectional view showing a state where the plate is slightly opened from the state of FIG. 5;

FIG. 7 is a cross-sectional view showing a state where a fixed mold and a movable mold are separated, and a molded body is released from the fixed mold.

FIG. 8 is a sectional view of a conventional injection molding die apparatus,
Second without magnets in the groove of the insert
It is the figure which installed the insert.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Injection mold apparatus 2 Second insert 3 Mold 4 Magnet 5 Movable mold 6 First insert 7 Fixed mold 8 Insert set jig 9 Plate 10 Second magnet 11 First insert 13 Coil spring 14 Groove 21 Holder 23 Insert support Mechanism 25 Coil spring

Claims (9)

[Claims] 1. A first insert and a second insert are embedded in at least one of a fixed mold and a movable mold, and molten resin is injected into a cavity formed by the fixed mold and the movable mold. Then, after molding the molded article, in the molding method of the injection molded article in which the molded article is released from the mold together with the first insert and the second insert, the first molding method is performed in advance.
A method for molding an injection-molded article, wherein after inserting a first magnet into an insert, at least a second insert made of iron is installed using an insert set jig so as to contact the magnet. 2. The method according to claim 1, wherein at least a second magnet is provided in the insert set jig, and a magnetic force of the second magnet is smaller than that of the first magnet. 3. An insert is embedded in at least one of a fixed mold and a movable mold at an angle to a release direction, and is formed from the fixed mold and the movable mold. In a molding method of an injection molded article, in which a molten resin is injected into a cavity, the molded article is molded, and then the molded article is released together with the insert from the mold, the insert is separated so that a biasing force is applied to the insert in a longitudinal direction of the insert. Injection molding characterized by providing mold assisting means to facilitate release of a molded product by applying a biasing force in the longitudinal direction of the insert when releasing the molded product from the fixed mold and the movable mold. Product molding method. 4. The method according to claim 3, wherein a plurality of the inserts are embedded in at least one mold, and the release assisting means is a coil spring wound around the inserts so as to apply a biasing force in a longitudinal direction of the inserts. The molding method of the injection molded article according to the above. 5. The first insert and the second insert are embedded in at least one of a fixed mold and a movable mold, and a molten resin is injected into a cavity formed by the fixed mold and the movable mold. Then, after the molded article is molded, in a method of molding an injection molded article in which the molded article is released together with the first insert and the second insert from the mold, after the first magnet is embedded in the iron first insert in advance. ,
At least a second insert made of iron is installed using an insert set jig so as to abut against the magnet, and is further fixed by providing a coil spring as a release assisting means to apply a biasing force to the first insert in the longitudinal direction of the insert. When releasing the molded product from the mold and movable mold, the first
A method for molding an injection-molded article, wherein a biasing force is applied in a longitudinal direction of the insert to facilitate release of the molded article. 6. An injection molding apparatus comprising a fixed mold and a movable mold, wherein the first insert and the second insert are embedded in at least one of the molds. An injection molding die apparatus, wherein the insert is made of iron, a magnet is embedded in the first insert, and a second iron insert is further embedded so as to contact the magnet. 7. An injection mold apparatus comprising a fixed mold and a movable mold, wherein an insert is embedded in at least one of the molds at an angle to a release direction. An injection mold device, wherein the insert is provided with a mold release assisting means. 8. The method according to claim 7, wherein a plurality of said inserts are embedded in at least one mold, and said release assisting means is a coil spring wound around said inserts so as to apply a biasing force in a longitudinal direction of said inserts. The mold apparatus for injection molding according to the above. 9. An injection molding apparatus comprising a fixed mold and a movable mold, wherein a plurality of first inserts and a plurality of second inserts are embedded in at least one of the molds at an angle with respect to a releasing direction. In the injection molding die apparatus, a magnet is embedded in a first iron insert, and at least a second iron insert is installed so as to contact the magnet, and a biasing force is applied to the first insert in a longitudinal direction of the insert. Wherein a coil spring wound around the first insert is provided as a release assisting means so as to add the mold.